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After-sale Service
Common faults and troubleshooting methods
Release time:
2016-09-08
The impeller has contaminated impurities, causing the gap to be too small; remove the dirt and check for any damage to the internal components; gear wear causes excessive side clearance; adjust the gear clearance, and if the gear side clearance is greater than the average value of 30% to 50%, the gear should be replaced; the gear is not securely fixed, which cannot maintain the synchronization of the impeller; reassemble the gear, ensuring that the contact area of the taper fit reaches 75%; bearing wear leads to increased play. Replace the bearing.
1. Impeller and impeller friction
(1) There are contaminants on the impeller, causing the gap to be too small; remove the contaminants and check for damage to internal components;
(2) Gear wear causes large side gaps; adjust the gear gap, if the gear side gap is greater than the average value of 30% to 50%, the gear should be replaced;
(3) The gear is not securely fixed, which cannot maintain the synchronization of the impeller; reassemble the gear, ensuring that the contact area of the taper fit reaches 75%;
(4) Bearing wear causes increased play. Replace the bearing.
2. Impeller and wall plate, impeller top and casing
(1) Installation gap is incorrect; readjust the gap;
(2) Operating pressure is too high, exceeding the specified value; identify the cause of overload and reduce the pressure to the specified value;
(3) Operating temperature is too high; check the installation accuracy and reduce pipeline tension;
(4) Casing or base deformation, fan positioning failure; check and repair the bearing, and ensure the play.
(5) Poor axial positioning of the bearing.
3. Temperature too high
(1) Too much, too thick, and dirty oil in the oil tank; lower the oil level or remove oil;
(2) Filter or silencer blockage; remove the blockage;
(3) Pressure exceeds the specified value; reduce the pressure difference through the blower;
(4) Excessive wear of the impeller, large gap; repair the gap;
(5) Poor ventilation, high indoor temperature, causing high inlet temperature; open ventilation openings to lower room temperature;
(6) Operating speed too low, belt slipping. Increase the speed to prevent belt slipping.
4. Insufficient flow
(1) Inlet filter blockage; remove dust and blockages from the filter;
(2) Impeller wear, gap increased too much; repair the gap;
(3) Belt slipping; tighten the belt and increase the number of belts;
(4) Large inlet pressure loss; adjust the inlet pressure to the specified value;
(5) Pipeline causes ventilation leakage. Check and repair the pipeline.
5. Oil leakage or oil leaking into the casing
(1) Oil tank level is too high, leaking from the oil outlet; lower the oil level;
(2) Seal wear causes oil leakage at the shaft end; replace the seal;
(3) Pressure exceeds the specified value; clear the ventilation openings, install a valve with a 2mm aperture in the middle chamber, and open the valve below the wall plate;
6. Excessive current
(1) Voltage too low; stop the fan operation, and replace with a high-power motor if necessary;
(2) Filter or pipeline blockage; clear the blockage;
(3) Changes in gaps within the fan, causing friction and collision; analyze the reasons for the gap changes and eliminate them, repair the friction areas;
(4) Excessive load; check the reasons for the overload and eliminate them, adjust to the rated load;
(5) Motor failure; repair the motor, and replace if necessary.
7. Abnormal vibration or noise
(1) Bearing damage, excessive play; replace the bearing;
(2) Foreign objects entering the impeller hole disrupt balance, or foreign objects stuck inside the fan; remove foreign objects and check for damage to the fan;
(3) Overload, overheating, etc. cause friction and collision inside the fan; eliminate factors causing abnormal working conditions and check for damaged components;
(4) Coupling misalignment; adjust the coupling;
(5) Belt tension too high or too low; adjust the belt tension;
(6) Loose bolts at relevant connection points; tighten the connecting bolts.
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